<template>
	<view>
		<!-- 自定义搜索组件 -->
		<!-- <my-search :bgcolor="'#C00000'" :radius="18"></my-search> -->
		<my-search @click="goToSearch"></my-search>
		<!-- 商品展示区域 -->
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 一级分类-->
			<scroll-view scroll-y="true" class="left-control-view" :style="{height: wh + 'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<view :class="['left-scroll-view-item',index === active ? 'active' : '']"
						@click="activeChange(index)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>
			<!-- 右侧滑动区域 二级分类-->
			<scroll-view scroll-y="true" class="right-control-view" :style="{height: wh + 'px'}"
				:scroll-top='scrollTop'>
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分类标题 -->
					<view class="cate-lv2-title">
						/{{item2.cat_name}}/
					</view>
					<!-- 三级分类区域 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="goToGoodsList(item3)">
							<image :src="item3.cat_icon"></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMixins from '@/mixins/tabbar-badge.js';
	export default {
		mixins: [badgeMixins],
		data() {
			return {
				wh: 0,
				// 分类数据列表
				cateList: [],
				active: 0,
				// 二级分类数据列表
				cateLevel2: [],
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync();
			// console.log(sysInfo)
			// 可用区高度（除去头部导航和底部导航）需要减去搜索栏50高度
			this.wh = sysInfo.windowHeight - 50;
			// 调用分类数据列表方法
			this.getCateList();
		},
		methods: {
			// 定义分类数据方法
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories');
				// console.log(res)
				if (res.meta.status !== 200) return uni.$showMsg();
				this.cateList = res.message;
				// 初始化cateLevel2数据
				this.cateLevel2 = res.message[0].children;
			},
			activeChange(index) {
				this.active = index;
				// 根据导航更新cateLevel2数据
				this.cateLevel2 = this.cateList[index].children;
				// 切换一级导航重置滚动条
				this.scrollTop = this.scrollTop ? 0 : 1;
			},
			// 点击三级分类跳转到商品详情页
			goToGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item3.cat_id
				})
			},
			// 点击跳转搜索页
			goToSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-control-view {
			width: 120px;

			.left-scroll-view-item {
				background-color: #F7F7F7;
				line-height: 60px;
				text-align: center;
				font-size: 12px;

				&.active {
					position: relative;
					background-color: #fff;

					&::before {
						content: ' ';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #C00;
						position: absolute;
						top: 50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}
		}

		.right-control-view {
			background-color: #fff;

			.cate-lv2 {
				.cate-lv2-title {
					font-size: 12px;
					font-weight: 700;
					text-align: center;
					padding: 15px 0;
				}

				.cate-lv3-list {
					display: flex;
					flex-wrap: wrap;

					.cate-lv3-item {
						width: 33.33%;
						display: flex;
						flex-direction: column;
						justify-content: center;
						align-items: center;
						margin-bottom: 10px;

						image {
							width: 60px;
							height: 60px;
						}

						text {
							font-size: 12px;
						}
					}
				}
			}
		}
	}
</style>
